if (document.body.clientWidth <= 768) {

	var oMenu = document.getElementById("menu-mo");
	var oBody = document.querySelector("body");
	var oClose = document.getElementById("closebtn").querySelector("button");
	var oMask = document.getElementById("mask");
	var Height = oMenu.offsetTop;
	oMenu.onclick = function () {
		oBody.classList.add("navbar-on");
	}
	oClose.onclick = function () {
		oBody.classList.remove("navbar-on");
	}
	oMask.onclick = function () {
		oBody.classList.remove("navbar-on");
	}
}
